Thanks for the suggestion, I hadn’t gone through file->import file to open the test library but just double-clicked it.
When I import them the way you suggested, it doesn’t recognize the PDFs as attached files; instead it treats the PDFs as URLs to the file system (see fig). Even though the link looks truncated, when I click on the link it opens a Finder window with the correct PDF selected. So the entire file location is in there somewhere…
